Ceramage 聚合瓷冠边缘适合性和抗折强度的研究

doi:10.3969/j.issn.1673-5749.2010.03.009

摘要/Abstract

摘要： 目的以金瓷冠为对照，研究黏固剂和温度循环对Ceramage 聚合瓷冠边缘适合性的影响，并进一步探讨黏固剂对Ceramage 聚合瓷冠抗折强度的影响。方法制作Ceramage 聚合瓷冠和镍铬合金烤瓷冠（以下称金瓷冠）各16 个，玻璃离子（GI）和树脂粘接剂（AR）分别黏固每种全冠各8 个，5 ℃/55 ℃水域循环5 000 次。体式显微镜测量冠边缘适合性，万能材料试验机测量抗折强度。结果 Ceramage 聚合瓷冠的边缘适合性优于金瓷冠（P<0.05）；2 种粘接剂间的边缘适合性差异无统计学意义（P>0.05）；黏固后各组边缘缝隙均增加（P<0.05）；各组温度循环前后边缘适合性差异无统计学意义（P>0.05）。Ceramage 聚合瓷冠的抗折强度低于金瓷冠（P<0.05）。结论 Ceramage 聚合瓷冠的边缘适合性优于金瓷冠，且在临床要求的范围内；Ceramage 聚合瓷冠的抗折强度较金瓷冠低，但超过了正常力范围；树脂粘接剂能提高Ceramage 聚合瓷冠的抗折强度。

关键词: 聚合瓷, 边缘适合性, 抗折强度, 温度循环

Abstract: Objective To evaluate the influence of different types of cements and thermocycling on marginal adaptation and fracture strength of Ceramage ceramic optimized polymer（ceromer） crowns. Methods Sixteen ceromer
crowns and sixteen metal-ceramic crowns were fabricated. Eight specimens of each crown type were cemented, using either glass ionomer cement（GI） or adhesive resin cement（AR）. All crowns were exposed to 5 000 thermal cycles between 5 ℃ and 55 ℃. The marginal adaptation were evaluated with a stereomicroscope. The fracture strength of the crowns were measured with universal testing machine. Results The marginal adaptation of ceromer crowns was statistically better than metal-ceramic crowns（P<0.05）. The mean marginal gap increased significantly after cementation in all groups（P<0.05）. The thermocycling did not result in a significant rise of the marginal gap of crowns（P>0.05）. The fracture strength of ceromer crowns was significantly lower than metal-ceramic crowns（P <0.05）. Conclusion Within the limits of this in vitro study it could be concluded that the marginal adaptation of ceromer crowns was better than metal-ceramic crowns. The fracture stre ngth of ceromer crowns exceeded normal occlusal forces. Adhesive resin cement improved the fracture strength of ceromer crowns.

Key words: marginal adaptation, fracture strength, thermocycling

中图分类号:

滕吉利, 骆琳, 梁星, 王航. Ceramage 聚合瓷冠边缘适合性和抗折强度的研究[J]. 国际口腔医学杂志, 2010, 37(3): 277-277～279，283.

TENG Ji-li, LUO Lin, LIANG Xing, WANG Hang.. An in vitro study of the marginal fit and fracture strength of Ceramage ceramic o[J]. Inter J Stomatol, 2010, 37(3): 277-277～279，283.

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